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What do you mean by surface rendering? Describe in brief the Gouraud shading method.
What do you mean by axonometric orthographic projection? Describe the term isometric, diametric and trimetric projection.
Define the homogeneous co-ordinate system and points at infinity. Write down the parametric equation of line defined between points (2, 4) and (6, -7).
Explain the Scan Line Seed fill algorithm to produce solid area on the screen.
Describe in brief the Z-Buffer method for hidden surface removal. Show how depths are computed for a planar Polygon Ax + By + Cz + D = 0 whose left edge has a slope m.
Illustrate the main difference between Gouraud shading with Phong shading techniques?
Describe the concept of region codes (or outcodes) in the Cohen-Sutherland line clipping algorithm. Use the algorithm to clip the line AD illustrated below.
Write down the open GL code which defines a two-dimensional straight line segment having co-ordinates (180, 15) and (10, 145).
What do you mean by B-spline curves? Illustrate any two properties of the B-spline curves.
Describe the Back-Face detection technique for locating the back faces of a polyhedron. Describe with the help of appropriate diagrams.
Specify the main differences between the Bezier curve, B-spline curves and B-spline curve-NURBS.
Describe the Constructive Solid Geometry (or CSG) method for solid modeling. In brief describe how ray-casting techniques are used to implement the CSG operations.
In brief explain the Cohen-Sutherland line clipping algorithm.
Describe the Depth sorting method for the hidden surface elimination. Name the tests which are performed if there is depth overlap?
Write down openGL curve functions, line functions and the Geometric transformation functions; two from each category with their respective meaning.
Compare and contrast the Z- Buffer algorithm and Depth sort algorithm for back face culling.
Write down the Bresenhem’s circle drawing algorithm. Why co-ordinates of just one eighth of the total pixels lying on the circumference of a circle are calculated?
Provide four illustrations each for Input and output devices which are used in the Computer Graphics.
Write down the difference between Raster and Vector Graphics Method. When do we prefer what?
Describe the following forms of parametric curves-Hermite, Bezier, Uniform B-spline, and Non uniform B-spline.
Write down and explain the midpoint circle drawing algorithm. Assume 10 cm as the radius and co-ordinate origin as the centre of the circle. Write detailed notes on RGB and HSV color models.
Describe the concept of Huffman coding with an appropriate example. As well describe how does it attain compression?
Write the equation for Walsh transform and list all the properties of Walsh transform.
What is the use of sharpening the image operation and analysis?
Describe the Cohen-Sutherland algorithm. This algorithm is proficient when outcode testing can be done economically.